YS/T 1050.8-2015 (YS/T1050.8-2015, YST 1050.8-2015, YST1050.8-2015)
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Methods for chemical analysis of lead antimony concentrates - Part 8: Determination of gold and silver contents - Fire assay method
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YS/T 1050.8-2015
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Standards related to: YS/T 1050.8-2015
| Standard ID | YS/T 1050.8-2015 (YS/T1050.8-2015) | | Description (Translated English) | Methods for chemical analysis of lead antimony concentrates. Part 8: Determination of gold and silver contents. Fire assay method | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | D42 | | Classification of International Standard | 73.06 | | Word Count Estimation | 7,769 | | Date of Issue | 2015-04-30 | | Date of Implementation | 2015-10-01 | | Drafting Organization | Guangxi Zhuang Autonomous Region Metallurgical Products Quality Supervision and Inspection Station, Hunan Shuikoushan Nonferrous Metals Group Co., Ltd., China Inspection and Certification Group Guangxi Co., Ltd. | | Administrative Organization | National Non-Ferrous Metals Standardization Technical Committee (SAC/TC 243) | | Regulation (derived from) | Ministry of Industry and Information Technology Announcement (2015 No. 28) | | Issuing agency(ies) | Ministry of Industry and Information Technology of the People's Republic of China | | Summary | This Standard specifies the method for determination of lead-antimony concentrate of gold and silver content. This Standard is applicable to lead-antimony concentrate in gold and silver content measurement, measurement range (mass fraction) of gold 0.50 g /T ~ 25.0 g /T, silver 100 g /T ~ 3 000 g /T. Arbitration analysis, mass fraction of silver 500��g /T, using flame atomic absorption spectrometry (YS /T 1050.9-2015). | YS/T 1050.8-2015
(Lead-antimony concentrates - Part 8. gold and silver contents - Fire Assay)
ICS 73.060
D42
People's Republic of China Nonferrous Metals Industry Standard
Methods for chemical analysis of lead-antimony concentrate
Part 8. Gold and silver content determination
Fire assay
Part 8. Determinationofgoldandsilvercontents-
Fireassaymethod
Issued on. 2015-04-30
2015-10-01 implementation
Ministry of Industry and Information Technology of the People's Republic of China released
Foreword
YS/T 1050-2015 "Methods for chemical analysis of lead-antimony concentrate" is divided into the following nine sections.
--- Part 1. Determination of lead content Na2EDTA titration;
--- Part 2. Determination of antimony content cerium sulfate titration;
--- Part 3. Determination of arsenic content potassium bromate titration;
--- Part 4. Determination of zinc contents Na2EDTA titration;
--- Part 5. Determination of sulfur content - Gravimetric method;
--- Part 6. Determination of iron content cerium sulfate titration;
--- Part 7. Determination of the amount of bismuth and copper - Flame atomic absorption spectrometry amount;
--- Part 8. gold and silver content determination fire assay;
--- Part 9. Determination of the amount of silver by flame atomic absorption spectrometry.
This section section 8.
This section drafted in accordance with GB/T 1.1-2009 given rules.
The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.
This section is responsible for drafting unit. Guangxi Metallurgical Product Quality Supervision and Inspection Station.
This section is drafted. Shuikoushan Hunan Nonferrous Metals Group Co., Ltd., China Certification & Inspection Group Co., Ltd. Guangxi.
This section participated in the drafting unit. China Nonferrous Guilin Research Institute of Geology and Minerals Co. Ltd., Hunan Nonferrous Metal Research Institute, Beijing Institute of Mining and Metallurgy
General Hospital study.
The main drafters of this section. Zeng Guangming, Luo Yongfeng Guo Park, Tanjian You, Weiya Juan, Shi Yihua, Zeng Zhiping, Li Bing, John Doe red, Feng Zhenhua,
History of Bo Yang, Huang Xusheng.
Methods for chemical analysis of lead-antimony concentrate
Section 8 Determination of the amount of gold and silver content
Fire assay
1 Scope
YS/T 1050 This section specifies the method for determination of lead-antimony concentrate of gold and silver content.
This section applies to the determination of lead-antimony concentrate in gold and silver content of the measurement range (mass fraction) of gold 0.50g/t ~ 25.0g/t, silver
100g/t ~ 3000g/t.
Arbitration analysis, mass fraction of silver ≤500g/t, using flame atomic absorption spectrometry (YS/T 1050.9-2015).
2 Method summary
After sample ingredients, high temperature melting, metal lead capture in a sample of precious metal buckle lead, and other substances in a sample of flux generated fusible
Of slag is removed, will lead button cupellation, get together grain precious metals, gold is insoluble in nitric acid utilizing the nature of the gold, silver separation, determination of silver by titration
Amount, the determination of gold by weight method.
3 Reagents
Unless otherwise indicated, this part of the reagents were analytical reagent, the water for the two water.
3.1 Sodium carbonate. Industrial pure.
3.2 Lead Oxide. commercially pure (gold content < 0.05g/t, silver < 1g/t).
3.3 Silica. commercially pure.
3.4 Borax. Industrial pure.
3.5 Sodium Chloride. industrial grade.
3.6 potassium nitrate.
3.7 starch.
3.8 Silver. wAg≥99.99%.
3.9 lead foil. wPb≥99.9%, the amount of gold < 0.05g/t, silver < 1g/t.
3.10 nitric acid (ρ = 1.42g/mL). pure class distinctions.
3.11 nitric acid (17). no chlorine ions.
3.12 nitric acid (11). no chlorine ions.
3.13 ferric ammonium sulfate indicator. Take 1 part of a saturated solution of ammonium ferric sulfate, 3 parts of nitric acid (13), and mix.
3.14 potassium thiocyanate standard titration solution A [c≈0.005mol/L].
3.14.1 preparation. Weigh 0.5g of potassium thiocyanate, placed in 100mL beaker, dissolved in water and transferred to 1000mL volumetric flask, diluted with water
To the mark, and mix. Stand for one week after filtration and set aside.
3.14.2 Calibration. Weigh 10mg ~ 15mg 3 parts pure silver (3.8), accurate to 0.01mg, were placed in 100mL porcelain crucible (4.8), and
Nitric acid was added 20mL (3.12), heat gently to dissolve completely and evaporated to about 2mL, washed with a small amount of hot crucible wall, solution volume control in 30mL
About adding 0.5mL ferric ammonium sulfate indicator (3.13), potassium thiocyanate standard solution (3.14.1) titrated to light red is the end.
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